<!DOCTYPE html>
<html>

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>test avalon</title>
 
<style>
    .header {
        height: 100px;
        background: blue;

    }

    .left {
        /* background: yellow; */
    }

    .right {
        /* background: tomato; */
    }

    .operate button {
        margin-left: 5px
    }
</style>

<body> 
    <h1>PAGE C</h1>
    <footer></footer>
    <script src="../js/pageC.js"></script>
</body>

</html>